package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //对比前端传来的明文密码进行md5转型比较
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }


    /**
     * 新增员工数据
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();

        //对象数据拷贝  ”属性名需要一致“
        BeanUtils.copyProperties(employeeDTO,employee);
        //设置员工状态  1表示启用  0表示停用
        employee.setStatus(StatusConstant.ENABLE);
        //设置默认密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //设置创建时间
        employee.setCreateTime(LocalDateTime.now());
        //设置修改时间
        employee.setUpdateTime(LocalDateTime.now());


        //设置当前记录创建人id和修改人id
        //取出存在jwt校验拦截线程中的登录者id对象
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());


        employeeMapper.insert(employee);
    }

    /**
     * 分页查询员工数据
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        //调用pagehelper插件中的方法
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        //获取总共数量
        long total = page.getTotal();
        //获取查询结果
        List<Employee> result = page.getResult();
        PageResult pageResult = new PageResult(total,result);

        return pageResult;
    }

    /**
     * 员工的启用和禁用
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //考虑代码的复用 这里使用update来修改员工的status状态
        //可以new一个employee对象，也可以使用builder来构建一个对象
        Employee employee = new Employee();
        employee.setStatus(status);
        //employee.setId(id);
        //employee.setUpdateTime(LocalDateTime.now());


        //employee.builder().status(status).id(id);
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        return employeeMapper.getById(id);
    }

    /**
     * 更新员工数据
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //拷贝传过来的信息
        BeanUtils.copyProperties(employeeDTO , employee);
        //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

}
